Stilbene
芪, 1,2-二苯乙烯, 均二苯代乙烯
🗣️ 情景例句
Would you like to sign the contract now?
你现在要签这合同吗？
The class made noticeable improvement.
这班有明显的进步。
Two men took the parcel off the plane and carried it into the Customs House.
有两个人把包裹拿下飞机，进了海关。